In June warmest sea in Slovenia is usually observed in the following locations: Portoroz, Piran, Strunjan.
Table below shows the average sea water temperature for marine resorts of Slovenia in June for the last three years.
| Place name | June 2026 | June 2025 | June 2024 |
|---|---|---|---|
| Portoroz | 76.2°F | 75.5°F | 73.7°F |
| Piran | 76.2°F | 75.5°F | 73.7°F |
| Strunjan | 76.2°F | 75.4°F | 73.5°F |
| Isola | 76.1°F | 75.3°F | 73.3°F |
| Koper | 76.1°F | 75.4°F | 73.1°F |
| Bohinjsko Jezero | 74.4°F | 72.7°F | 71.0°F |
| Cerkno | 74.4°F | 72.9°F | 71.1°F |
| Dolenjske Toplice | 73.2°F | 71.1°F | 71.7°F |
Charts below show average sea water temperature for Slovenia resorts with the warmest sea in June.
You can also check other months of the year to see sea temperature of Slovenia resorts at that time.
Places in Slovenia:
Name
°F
